TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Const Sheet Client TName: WC BOE Volume (liters): 1944 Lab Group #: 5948 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 9 Area Examined: 0.04496 mm=

GRID BOX: ]\lagnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/21/01

Analysis Performed By: /A) (A MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Structure N or A EDS (Nonadb No F B C M >-05 p :>=5(J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) I

<5

(TA -

i

i ] r

Struct = > 0.5p > 5:1 .Aspect Ratto Grid asceptance; Positive diffraction pattern properiies conforming to ^5P% undissolved fitter, overlapped orfolded Totals 10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overaopei grid souares <5% j B C EDS spectrum conforming to laboratory holes or opaque areas L ! F identification criteria observed Chrysotile ■AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite .Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix I Non-ldentified Actinolite ! i NSD = No Structures Delected

CITY_21MC1OO_OO31O6648

NYC-WTC_000185490